/Engine/Source/Runtime/RHI/Public/RHITransientResourceAllocator.h
Flushes any pending allocations prior to rendering. Optionally emits stats if OutStats is valid.
void Flush ( [FRHICommandListImmediate](API\Runtime\RHI\FRHICommandListImmediate) & RHICmdList, [FRHITransientAllocationStats](API\Runtime\RHI\FRHITransientAllocationStats) * OutStats )